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Toxicoscordion venenosum var. venenosum

Higher Taxonomy
Family: MelanthiaceaeView DescriptionDichotomous Key

Common Name: FALSE-HELLEBORE FAMILY
Habit: Perennial herb, from rhizome or bulb, or rhizomes ending in weakly developed bulbs, scapose or not. Leaf: alternate, whorled, or mostly basal and spirally arranged, deciduous after 1 year or not. Inflorescence: raceme, panicle, or flowers 1. Flower: perianth parts 6, in 2 petal-like whorls or of sepals and petals, free or fused below, +- spreading; stamens 6, from perianth, anthers attached at base or near middle; ovary superior or partly inferior, chambers 3, styles 3, persistent. Fruit: capsule, loculicidal or septicidal.
Genera In Family: 10 genera, 130 species: northern hemisphere. Note: W North America Zigadenus moved to Toxicoscordion.
eFlora Treatment Author: Dale W. McNeal, except as noted
Scientific Editor: Dale W. McNeal, Thomas J. Rosatti.
Genus: ToxicoscordionView DescriptionDichotomous Key

Common Name: DEATH CAMAS
Stem: +- scapose. Leaf: +- basal, reduced upward, linear, generally folded, +- curved, entire, deciduous after 1 year. Inflorescence: raceme or panicle; flower bracts 1 (or reportedly 2). Flower: staminate, sterile, or generally bisexual; perianth parts 6, petal-like, free or +- fused to ovary base, white to +- yellow [or not], adaxially with [0]1[2] glands near base; stamens 6, free to +- attached to perianth; ovary superior, chambers 3, styles 3. Fruit: capsule, septicidal. Seed: many.
Species In Genus: +- 8 species: central United States, western North America. Etymology: (Greek: poison garlic, for poisonous bulb) Toxicity: All taxa highly TOXIC (generally unpalatable) to livestock, humans from alkaloids (especially in bulbs). Note: As treated in TJM (1993), Zigadenus polyphyletic, so California members transferred to Toxicoscordion (Zomlefer & Judd 2002 Novon 12:299--308).
eFlora Treatment Author: Dale W. McNeal & Wendy B. Zomlefer

Toxicoscordion venenosum (S. Watson) Rydb. var. venenosum
NATIVE
Habit: Bulb 12--25 mm diam, widely ovate; outer coat +- brown. Stem: 15--70 cm, glabrous. Leaf: 10--40 cm, 4--10 mm wide, scabrous-ciliate. Inflorescence: raceme except occasionally with 1 branch below, 5--25 cm; bracts 5--25 mm, white-membranous to generally green; pedicels in fruit spreading to generally ascending, 3--25 mm. Flower: bisexual; perianth parts 4--6 mm, +- ovate, obtuse, outer generally with claw < 5 mm, inner clawed, gland distal margin evident or not; stamens =, occasionally > perianth; styles erect. Fruit: 8--14 mm, cylindric. Chromosomes: n=11.
Ecology: Moist meadows to dry rocky hillsides; Elevation: < 2600 m. Bioregional Distribution: NW, CaR, SN, CW, WTR, PR, GB, DMtns; Distribution Outside California: to British Columbia, central United States, Arizona, northern Baja California. Flowering Time: May--Jul
Synonyms: Zigadenus venenosus S. Watson var. venenosus
eFlora Treatment Author: Dale W. McNeal & Wendy B. Zomlefer
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botanical illustration including Toxicoscordion venenosum var. venenosum

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Citation for this treatment: Dale W. McNeal & Wendy B. Zomlefer 2016. Toxicoscordion venenosum var. venenosum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=93851, accessed on May 03, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 03, 2016.


Toxicoscordion venenosum var. venenosum
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© 2016 Steve Matson
Toxicoscordion venenosum var. venenosum
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© 2014 Neal Kramer
Toxicoscordion venenosum var. venenosum
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© 2009 Keir Morse
Toxicoscordion venenosum var. venenosum
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© 2001 Gary A. Monroe
Toxicoscordion venenosum var. venenosum
click for enlargement
© 2014 Neal Kramer
Toxicoscordion venenosum var. venenosum
click for enlargement
© 2009 Keir Morse

More photos of Toxicoscordion venenosum var. venenosum in CalPhotos


Geographic subdivisions for Toxicoscordion venenosum var. venenosum:
NW, CaR, SN, CW, WTR, PR, GB, DMtns;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.